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| Titel |
Assessment of atmospheric trace element concentrations by lichen-bag near an oil/gas pre-treatment plant in the Agri Valley (southern Italy) |
| VerfasserIn |
R. Caggiano, S. Trippetta, S. Sabia |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 15, no. 2 ; Nr. 15, no. 2 (2015-02-23), S.325-333 |
| Datensatznummer |
250119322
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| Publikation (Nr.) |
 copernicus.org/nhess-15-325-2015.pdf |
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| Zusammenfassung |
| The atmospheric concentrations of 17 trace elements (Al, Ca, Cd, Cr, Cu, Fe,
K, Li, Mg, Mn, Na, Ni, P, Pb, S, Ti and Zn) were measured by means of the
"lichen-bag" technique in the Agri Valley (southern Italy). The lichen
samples were collected from an unpolluted site located in Rifreddo forest
(southern Italy), about 30 km away from the study area along the north
direction. The bags were exposed to ambient air for 6 and 12 months. The
exposed-to-control (EC) ratio values highlighted that the used lichen
species were suitable for biomonitoring investigations. The results showed
that the concentrations of almost all the examined trace elements increased
with respect to the control after 6–12-month exposures. Furthermore, Ca,
Al, Fe, K, Mg and S were the most abundant trace elements both in the
6-month and 12-month-exposed samples. Moreover, principal component analysis
(PCA) results highlighted that the major sources of the measured atmospheric
trace elements were related both to anthropogenic contributions due to
traffic, combustion processes agricultural practices, construction and
quarrying activities, and to natural contributions mainly represented by the
re-suspension of local soil and road dusts. In addition, the contribution
both of secondary atmospheric reactions involving Centro Olio Val d'Agri
(COVA) plant emissions and the African dust long-range transport were also identified. |
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